VEVOR Dog Door for Sliding Glass Door, 1927 mm to 2049 mm Adjustable Height, Aluminum Alloy Frame with Flap, Lock Design, for Medium-Sized Dogs, 180° Swing-Open Sliding Glass Pet Doors for Renters

Medium Dog Door for Sliding Glass Door Sized for Pets Up to 40 lbs 

The VEVOR medium dog door for sliding glass door is designed for pets weighing up to 40 lbs (18 kg), covering medium-sized dogs including Beagles, Cavalier King Charles Spaniels, Miniature Schnauzers, Whippets, and similarly proportioned breeds whose combination of body weight and shoulder width falls within the medium category. The 209.6 × 311.2 mm (8.25 × 12.25 in) flap opening fits medium dogs comfortably while reducing drafts compared to larger flap openings. 

Matching the flap size to the dog's weight and shoulder width rather than selecting a larger size as a precaution directly improves the thermal performance of the installation. A smaller, correctly sized flap opening returns to its sealed position faster after each pet passage and presents less surface area for wind pressure to act on during outdoor exposure. 

Detachable High-Density Felt Weatherstripping for Replaceable Draft Sealing 

The felt weatherstripping is removable from the frame and flap of this pet door. This means the sealing material can be replaced separately if it becomes less effective due to wear or compression, without replacing the whole panel. Felt weatherstripping in a pet door experiences more compression cycles than standard door seals. This is because each pet passage compresses the felt at the flap perimeter, and over time, the felt fibers permanently set, which lowers the contact pressure against the frame face.

The detachable design directly addresses this wear issue. When felt shows visible compression or drafts can be felt at the panel edges in cold weather, the worn felt strips are removed and replaced with new material. This keeps the panel sealed without replacing the entire unit. 

Slide-In Closing Panel for One-Second Access Blocking Between Pet Sessions 

This medium dog door for sliding glass doors features a slide-in closing panel that blocks the flap opening in seconds, without the need for tools, a lock, or removing the panel from the track. This instant-closure feature is made for times when pet access needs to be temporarily blocked, such as when outdoor access needs to be restricted or when the weather changes quickly. The flap can be closed immediately without using the lock. 

You can use both the closing panel and the button lock separately or together for maximum blocking security. The choice depends on how long you need to close it and what kind of closure you need. It is easy to operate the slide-in action with one hand while doing other things, which is useful when the owner is busy with leads, bags, or other items while bringing the dog inside for the night.

Button Security Lock for Instant One-Press Flap Closure and Release 

Instead of turning or using a key, this medium dog door for sliding glass door has a button security lock that engages and unlocks the flap closure with a single press. A single press locks or unlocks the flap; it can be used consistently as part of the daily routine for controlling pet access, enabled when the dog is called in for the night and released when the dog is let out in the morning, without the hassle of turning a key, making it easier to use every day. 

The button lock keeps the flap from being pushed from both the inside and the outside. This way, the flap cannot be opened by the dog trying to open it from either side. This two-way resistance is important in situations where the dog has learned that the flap can be pushed open normally and where a lock that only resists outside pressure would not stop the dog from pushing through from the inside when access is supposed to be limited.

Medium Dog Door for Sliding Glass Door with PVC Flap and Premium Metal Hinges 

The flap panel is made of PVC flap, which provides the flexibility, weather resistance, and surface durability needed for a part that will be used thousands of times over the life of the pet door. PVC remains flexible across a wide range of outdoor temperatures. It remains flexible enough for the dog to push through with normal effort in cold weather, unlike harder flap materials that get stiff at low temperatures.

The high quality metal hinges that hold the PVC flap in place keep it from warping and sagging like plastic hinges do when the flap is heavy and bent repeatedly every day. The metal hinges ensure the flap stays in place against the frame's edge after each pet passage and remains in contact with the felt seal around the opening edge through years of regular use. 

Tempered Glass Panel and Aluminum Frame for a Durable, Weather-Resistant Installation 

The tempered glass upper panel resists scratches and impacts during daily pet use. The panel is 19.2 pounds (8.7 kg) lighter than the large version, but it still has the same tempered glass and aluminum alloy frame specifications. This means one person can carry it and place it in the sliding door track without help when installing it for the first time or removing it to clean it.

The aluminum alloy frame resists rust in outdoor use, so it does not need a protective coating or regular maintenance. Additionally, the tempered glass panel and aluminum construction make for a pet door installation that stays structurally and aesthetically sound through rain, frost, and summer heat, without the surface wear and tear that painted steel or plastic alternatives experience over time.